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https://issues.apache.org/jira/browse/HADOOP-3295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655049#action_12655049
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Suhas Gogate commented on HADOOP-3295:
--------------------------------------
Feature added by this Jira has a problem while setting up some of the invalid
xml characters e.g. ctrl-A e.g. mapred.textoutputformat.separator = "\u0001"
e,g,
String delim = "\u0001";
Conf.set("mapred.textoutputformat.separator", delim);
Job client serializes the jobconf with mapred.textoutputformat.separator set to
"\u0001" (ctrl-A) and problem happens when it is de-serialized (read back) by
job tracker, where it encounters invalid xml character.
The test for this feature public : testFormatWithCustomSeparator() does not
serialize the jobconf after adding the separator as ctrl-A and hence does not
detect the specific problem.
Here is an exception:
08/12/06 01:40:50 INFO mapred.FileInputFormat: Total input paths to process
: 1
org.apache.hadoop.ipc.RemoteException: java.io.IOException:
java.lang.RuntimeException: org.xml.sax.SAXParseException: Character reference
"" is an invalid XML
character.
at
org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:961)
at
org.apache.hadoop.conf.Configuration.loadResources(Configuration.java:864)
at
org.apache.hadoop.conf.Configuration.getProps(Configuration.java:832)
at org.apache.hadoop.conf.Configuration.get(Configuration.java:291)
at
org.apache.hadoop.mapred.JobConf.getJobPriority(JobConf.java:1163)
at
org.apache.hadoop.mapred.JobInProgress.<init>(JobInProgress.java:179)
at
org.apache.hadoop.mapred.JobTracker.submitJob(JobTracker.java:1783)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:452)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888)
at org.apache.hadoop.ipc.Client.call(Client.java:715)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
at org.apache.hadoop.mapred.$Proxy1.submitJob(Unknown Source)
at org.apache.hadoop.mapred.JobClient.submitJob(JobClient.java:788)
at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1026)
at
> Allow TextOutputFormat to use configurable separators
> -----------------------------------------------------
>
> Key: HADOOP-3295
> URL: https://issues.apache.org/jira/browse/HADOOP-3295
> Project: Hadoop Core
> Issue Type: Improvement
> Components: io
> Reporter: Zheng Shao
> Assignee: Zheng Shao
> Priority: Minor
> Fix For: 0.18.0
>
> Attachments: 3295-2.patch, 3295.patch
>
>
> TextOutputFormat use hardcoded tab as key-value separator. We should allow
> configurable separators like ^A, etc.
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